JP3568883B2 - Pressure booster - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pressure intensifier that increases and outputs air pressure.
[0002]
[Prior art]
Conventionally, in a pressure booster of this kind, a piston in a pair of cylinders connected via a partition is connected by a rod penetrating the partition, and a switching valve is provided from an air source to a drive chamber formed outside each piston. These pistons are reciprocated by supplying air pressure alternately through the air, and the air pressure is increased and output in a pressure-increasing chamber formed inside the pistons. The discharged air is released into the atmosphere as exhaust air and discarded.
[0003]
[Problems to be solved by the invention]
By the way, in the pressure intensifier as described above, after the piston is driven, unnecessary air is discarded into the atmosphere as exhaust air, so if a plurality of pressure intensifiers are connected in series to increase the pressure intensifying effect, Since the exhaust air is discarded into the atmosphere from each pressure intensifier, the air consumption increases, and as a result, the air source is forced to supply a large amount of air, which leads to an increase in power consumption and, consequently, running costs. There is a problem that it is high.
The present invention has been made in view of the above problems, and an object thereof is to improve a pressure increasing effect without increasing power consumption by reusing exhaust air. It is an object of the present invention to provide a pressure intensifier capable of reducing pressure.
The above and other objects and novel features of the present invention will become apparent from the description of the present specification and the accompanying drawings.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, a pressure booster according to the present invention is provided so as to sandwich a partition having an inlet port for introducing air, an outlet port for outputting boosted air, and an exhaust port for discharging exhaust air. A pair of cylinders, a pair of pistons reciprocating in the pair of cylinders, and connected by rods penetrating the partition wall in an airtight manner; An inlet check valve that allows only air to flow into each booster chamber, an outlet check valve that only allows air to flow from each booster chamber to the outlet port, and an outer check valve that is provided outside the pair of pistons. A pressure intensifier having a plurality of pressure intensifier valves including a switching valve for switching a drive chamber to the inlet port and the exhaust port to communicate with each other, wherein the pressure intensifier is connected in series to an air source. A port communicates with an inlet port of the booster valve on the downstream side, and an inlet port of the booster valve on the upstream side communicates with an exhaust port of the booster valve on the downstream side to drive the booster valve on the downstream side. The exhaust air of the chamber is introduced into the drive chamber of the pressure intensifier valve on the upstream side, and the exhaust air of the pressure intensifier valve on the downstream side is used as a drive source of the pressure intensifier valve on the upstream side.
[0005]
Therefore, in the present invention, first, the air from the air source passes through the upstream pressure-intensifying valve and flows into the downstream pressure-intensifying valve, whereby the downstream pressure-intensifying valve is driven to output the pressure-enhanced air. At the same time, the exhaust air in the drive chamber is introduced into the upstream pressure increasing valve, and drives the upstream pressure increasing valve together with the air from the air source.
As described above, in the present invention, the air pressure increased by the upstream pressure increasing valve is further increased by the downstream pressure increasing valve. At this time, the exhaust air discharged from the downstream pressure increasing valve is increased by the upstream pressure increasing valve. Since it is used for driving the pressure valve, air consumption is reduced.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In describing the embodiments, components having the same function are denoted by the same reference numerals.
1 and 2 are a schematic configuration diagram and a schematic cross-sectional view of a pressure booster according to an embodiment of the present invention.
[0007]
That is, as shown in FIG. 1, the pressure intensifier has a first pressure intensifier valve 10 and a second pressure intensifier valve 20, an air source P is connected to the first pressure intensifier valve 10, and a first pressure intensifier valve is provided. The 10 and the second pressure-intensifying valve 20 are connected in series.
2, in the first pressure-intensifying valve 10, pistons 14a and 14b are inserted through a pair of cylinders 13a and 13b provided on both sides of a partition 11 so as to be slidable in a reciprocating manner. The pressure increase chambers 15a and 15b and the drive chambers 16a and 16b are respectively formed inside and outside the cylinders 13a and 13b.
The partition 11 communicates with the air source P, and has an inlet port 1a for introducing air into the pressure-intensifying chambers 15a and 15b, an inlet port 1b for communicating with the driving chambers 16a and 16b, an outlet port 1c for outputting the pressure-increasing air, and exhaust air. An exhaust port 1d for exhausting air into the atmosphere is provided. A pair of inlet check valves 17a, a pair of outlet check valves 17b, and a switching valve 18 are incorporated in an air flow path formed in the partition wall 11.
[0008]
The pair of inlet check valves 17a and the pair of outlet check valves 17b are in communication with each other. The pair of inlet check valves 17a allows only air to flow into the pressure-intensifying chambers 15a and 15b. The outlet check valve 17b allows only the outflow of air from the pressure intensifying chambers 15a and 15b. However, if an air pressure difference occurs in the pressure intensifying chambers 15a and 15b, the inflow of air to the higher air pressure is prevented. As a result, the outflow of air from the lower air pressure is prevented.
[0009]
The switching valve 18 switches the flow path so that air is supplied to one of the driving chambers 16a and 16b and air is discharged from the other, and has push rods 18a and 18b for switching the flow path. The push rods 18a and 18b are respectively protruded into the pressure-increasing chambers 15a and 15b, and the reciprocating pistons 14a and 14b press the push rods 18a and 18b near the end of the stroke so that the ports of the switching valve 18 are connected. By switching the communication, the drive chambers 16a and 16b are alternately connected to the air inlet port 1b and the exhaust port 1d.
[0010]
In the second pressure-intensifying valve 20, the partition 21 is provided with an inlet port 2a, an outlet port 2b, and an exhaust port 2c, and the pistons 24a, 24b can reciprocate on a pair of cylinders 23a, 23b provided on both sides of the partition 21. The pistons 24a and 24b are connected to each other by a rod 22 which is hermetically penetrated by a partition 21 and, inside and outside the cylinders 23a and 23b, pressure-increasing chambers 25a and 25b and driving chambers 26a and 26a, respectively. A pair of inlet check valves 27a, a pair of outlet check valves 27b, and a switching valve 28 are incorporated in the air flow path formed in the partition 21.
[0011]
The pair of inlet check valves 27a and the pair of outlet check valves 27b are in communication with each other, and the pair of inlet check valves 27a allow only air to flow into the pressure-intensifying chambers 25a and 25b. The outlet check valve 27b allows only the outflow of air from the booster chambers 25a and 25b. However, if a difference in air pressure occurs between the booster chambers 25a and 25b, the inflow of air to the higher air pressure is prevented. As a result, the outflow of air from the lower air pressure is prevented.
[0012]
The switching valve 28 switches the flow path so as to supply air to one of the drive chambers 26a and 26b and discharge air from the other, and has push rods 28a and 28b for switching the flow path. The push rods 28a and 28b are projected into the pressure-intensifying chambers 25a and 25b, respectively, and the reciprocating pistons 24a and 24b press the push rods 28a and 28b near the end of the stroke, so that the distance between the ports of the switching valve 28 is increased. The communication is switched so that the drive chambers 26a and 26b alternately communicate with the air inlet port 2a and the exhaust port 2c.
[0013]
The outlet port 1c of the first booster valve 10 and the inlet port 2a of the second booster valve 20, and the inlet port 1b of the first booster valve 10 and the exhaust port 2c of the second booster valve 20 communicate with each other. The exhaust air from the drive chambers 26a, 26b of the second pressure-intensifying valve 20 is introduced into the drive chambers 16a, 16b of the first pressure-intensifying valve 10, and is used as a drive source for the pistons 14a, 14b of the first pressure-intensifying valve 10. It has become. In the figure, reference numeral 29 denotes a governor for controlling and maintaining the output pressure of the outlet port 2b at a constant pressure.
[0014]
Since the pressure intensifier is configured as described above, first, air from the air source P flows into the pressure intensifying chambers 15a and 15b from the inlet port 1a of the first pressure intensifying valve 10. At this time, no air is supplied to the driving chambers 16a or 16b, so that the air flowing into the pressure-intensifying chambers 15a and 15b is introduced into the driving chamber 26b via the inlet port 2a of the second pressure-intensifying valve 20, and It flows into the pressure intensifying chambers 25a and 25b.
Accordingly, the pistons 24a and 24b start to be driven rightward in the drawing by the combined force of the force acting on the piston 24b in the drive chamber 26b and the force acting on the piston 24a in the pressure-intensifying chamber 25a. The air of 25b is compressed to increase the pressure, and is output from the outlet port 2b through the outlet check valve 27b.
[0015]
When the pistons 24a and 24b and the rod 22 reach the right end, the pressure in the pressure increasing chamber 25b is increased and output from the outlet port 2b, and the switching valve 28 is switched to connect the driving chamber 26a to the inlet port 2a. At the same time, the drive chamber 26b is communicated with the inlet port 1b of the first pressure increasing valve 10 via the exhaust port 2c.
From this state, the pistons 24a and 24b start driving to the left in the drawing by the combined force of the force acting on the piston 24a in the drive chamber 26a and the force acting on the piston 24b in the pressure boosting chamber 25b. The air in the pressure chamber 25a is compressed to increase the pressure, and is output from the outlet port 2b through the outlet check valve 27b. At the same time, the exhaust air in the drive chamber 26b is introduced into the inlet port 1b of the first pressure increasing valve 10, and the first pressure increase is performed. It is introduced into the drive chamber 16b of the pressure valve 10.
[0016]
The pistons 14a and 14b move rightward in the drawing by the combined force of the force acting on the piston 14b in the drive chamber 16b and the force acting on the piston 14a in the pressure increasing chamber 15a by the air from the air source P and the exhaust air introduced. Driving is started, whereby the air in the pressure increasing chamber 15b is compressed to increase the pressure, and is output from the outlet port 1c to the second pressure increasing valve 20 through the outlet check valve 17b.
When the pistons 14a and 14b and the rod 12 reach the right end, the pressure in the pressure increasing chamber 15b is increased and output from the outlet port 1c is completed, and the switching valve 18 is switched to connect the driving chamber 16a to the inlet port 1b. At the same time, when the driving chamber 16b is opened to the atmosphere via the exhaust port 1d, the pistons 14a and 14b are caused by the combined force of the force acting on the piston 14a in the driving chamber 16a and the force acting on the piston 14b in the pressure increasing chamber 15b. Driving to the left in the drawing is started, whereby the air in the pressure increasing chamber 15a is compressed to increase the pressure, and is output from the outlet port 1c to the second pressure increasing valve 20 through the outlet check valve 17b, and the air in the drive chamber 16b is Is discharged into the atmosphere from the exhaust port 1d.
Such an operation is repeatedly performed, and the air pressure increased by the first pressure increasing valve 10 is further increased by the second pressure increasing valve 20 and output.
[0017]
As described above, according to the pressure increasing device of the present embodiment, the exhaust air of the second pressure increasing valve 20 is introduced into the drive chambers 16a, 16b of the first pressure increasing valve 10 to drive the pistons 14a, 14b. Therefore, the amount of air consumed from the air source P is reduced, power consumption can be reduced, and cost can be reduced.
[0018]
As described above, the pressure booster according to the embodiment of the present invention has been described in detail. However, the present invention is not limited to the pressure booster according to the embodiment, and is described in the claims of the present invention. Various changes can be made in the design without departing from the spirit of the invention.
For example, the pressure intensifier of the above embodiment includes two pressure intensifier valves 10 and 20 connected in series. However, if three or more pressure intensifier valves are connected in series, the air consumption increases. Without this, the pressure increasing effect can be further improved.
[0019]
【The invention's effect】
As can be understood from the above description, in the pressure increasing device of the present invention, the air pressure increased by the upstream pressure increasing valve is further increased by the downstream pressure increasing valve. Since the exhaust air is reused for driving the pressure increasing valve on the upstream side, the air consumption is reduced, and the pressure increasing effect can be improved at low cost without increasing power consumption.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a pressure intensifier according to an embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view of a pressure intensifier according to an embodiment of the present invention.
[Explanation of symbols]
1a, 1b, 2a Inlet ports 1c, 2b Outlet ports 1d, 2c Exhaust port 10 First booster valve 11, 21 Partition walls 13a, 13b, 23a, 23b Cylinders 14a, 14b, 24a, 24b Pistons 15a, 15b, 25a, 25b Intensification chambers 16a, 16b, 26a, 26b Driving chambers 17a, 27a Inlet check valves 17b, 27b Outlet check valves 18, 28 Switching valve 20 Second intensifier valve P Air source

Claims (1)

A pair of cylinders provided so as to sandwich a partition having an inlet port for introducing air and an outlet port for outputting pressurized air, and an exhaust port for discharging exhaust air, reciprocating in the pair of cylinders, A pair of pistons connected by a rod that penetrates the partition in an airtight manner, and an inlet check valve that allows only air to flow into the partition from the inlet port to each of the pressure-increasing chambers inside the pair of pistons. An outlet check valve for allowing only air to flow from each of the pressure-intensifying chambers to the outlet port; and a switch for switching each of the driving chambers outside the pair of pistons to the inlet port and the exhaust port for communication. A pressure booster in which a plurality of pressure boosting valves having valves are connected in series to an air source,
The outlet port of the booster valve on the upstream side communicates with the inlet port of the booster valve on the downstream side, and the inlet port of the booster valve on the upstream side communicates with the exhaust port of the booster valve on the downstream side. The exhaust air of the drive chamber of the booster valve on the side is introduced into the drive chamber of the booster valve on the upstream side, and the exhaust air of the booster valve on the downstream side is used as a drive source of the booster valve on the upstream side. Pressure intensifier.

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